So I finished my playthrough of automotron and assumed the bot customisations I couldn't do when I started would be unlocked. I went to make some new bots and I have quite a bit of bot parts not highlighted. So do I need a perk to unlock them or just go farm them and hope rng bless's me with the one's I need? And if farming is the way anybody found some good spots? I assume the array where the rust devils are would be a start. Thanks.

When you highlight a mod look to the far right and it should say the perks you need in order to unlock and build that mod.

I got to thinking while at work that might be locked do to perk as I have not taken the robotics expert perk. I will look when I log on tonight and see what I might need. It just bummed me out I couldnt build the bot I wanted, lol.

Yeah Robot Expert is needed for a lot of them (which requires an 8 INT). But you can still get lucky and find them also.